In vivo and in situ measurements of the digestive characteristics of sainfoin in comparison with lucerne fed to sheep as fresh forages at two growth stages and as hay
| Autor: | M. Dudilieu, J. Aufrere, C. Poncet |
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| Přispěvatelé: | Unité de Recherches sur les Herbivores (URH), Institut National de la Recherche Agronomique (INRA) |
| Jazyk: | angličtina |
| Rok vydání: | 2008 |
| Předmět: |
FEED VALUE
Forage Biology in vivo and in situ measurements SF1-1100 Abomasum SAINFOIN Rumen Dry matter LUCERNE 2. Zero hunger TANNINS Onobrychis viciifolia 0402 animal and dairy science 04 agricultural and veterinary sciences biology.organism_classification 040201 dairy & animal science Animal culture IN SITU MEASUREMENTS Proanthocyanidin Agronomy [SDV.SA.SPA]Life Sciences [q-bio]/Agricultural sciences/Animal production studies 040103 agronomy & agriculture Hay 0401 agriculture forestry and fisheries Animal Science and Zoology Digestion |
| Zdroj: | Animal Animal, Published by Elsevier (since 2021) / Cambridge University Press (until 2020), 2008, 2 (9), pp.1331-1339. ⟨10.1017/S1751731108002450⟩ animal animal, Published by Elsevier (since 2021) / Cambridge University Press (until 2020), 2008, 2 (9), pp.1331-1339. ⟨10.1017/S1751731108002450⟩ Animal, Vol 2, Iss 9, Pp 1331-1339 (2008) |
| ISSN: | 1751-7311 1751-732X |
| Popis: | International audience; In vivo and in situ digestive characteristics of sainfoin (Onobrychis viciifolia L., a tannin-rich forage) and lucerne (Medicago sativa L., a tannin-free forage) were compared to evaluate the effects of condensed tannins (CT) and growth stage (vegetative v. early flowering) in experiment 1. In experiment 2, the hays of the two forages, harvested at early flowering, were compared. Ingestibility, organic matter digestibility (OMD) and nitrogen (N) retention were measured in sheep fed sainfoin and lucerne fresh forages and hays. The loss of dry matter (DM) and N from polyester bags suspended in the rumen, abomasum and small intestine was also measured using rumen fistulated sheep and other intestine fistulated sheep. Nitrogen content was lower in sainfoin than in lucerne. Content of CT in sainfoin decreased with growth stage (3.5 to 2.5 g CT/kg DM) and was lower for sainfoin hay (0.6 g CT/kg DM). Ingestibility and OMD did not differ between fresh-fed forage species. Total N tract digestibility in vivo was much lower for sainfoin than for lucerne fresh forages (mean value 0.540 v. 0.721, P,0.001) and for sainfoin hay than lucerne hay (0.464 v. 0.683, P,0.001). In both species, N digestibility was not altered by growth stage. The rumen degradation of N was lower in sainfoin than in lucerne, resulting in a lower proportion of N intake excreted in urine. The intestinal digestibility of sainfoin was also lower than that of lucerne, resulting in a higher N excretion in faeces. Hence the efficiency of N utilisation by sheep (ENr) was similar (mean value 0.205 and 0.199 g N retained/g N intake for fresh sainfoin and lucerne, respectively). The coefficient of N retention by the animal was higher for sainfoin at the vegetative stage than for all the other forages. Nitrogen degradability in the rumen determined by the nylon bag technique (DegN) was lower for sainfoin than for lucerne when forages were studied both fresh (mean value 0.608 and 0.818, respectively) and as hays (0.631 and 0.767). The efficiency of forage N digestion (ENd) was higher for sainfoin at the vegetative stage. Compared with lucerne, sainfoin greatly increased the in situ estimate of forage N escaping the rumen but decreased its intestinal digestibility |
| Databáze: | OpenAIRE |
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